L5590 HCPCS code: Preparatory, above knee - knee disarticulation ischial level socket, non-alignable system, pylon no cover, sach foot, laminated socket, molded to model
L5590 is the HCPCS Level II code for preparatory, above knee - knee disarticulation ischial level socket, non-alignable system, pylon no cover, sach foot, laminated socket, molded to model. The 2026 Medicare DMEPOS fee schedule pays $2,943.01 to $4,568.53 depending on the state. Its Medicare coverage code is C (Carrier judgment): Coverage is decided by the Medicare contractor (MAC) case by case. The NCCI unit limit is 2 per day on DME suppliers. Medicare volume fell 10% from 2022 to 2024 (723 to 648 services). In 2024, 294 suppliers billed Medicare for L5590 (purchases), serving 633 beneficiaries; California, Pennsylvania, New Jersey accounted for 44% of services. Its average fee ranks 11 of 13 L55 codes (family range $1,800.60–$5,634.97).
Code details
| Field | Value |
|---|---|
| Section | L codes — Orthotic and prosthetic procedures and devices |
| Coverage code | C — Carrier judgment |
| Pricing indicator | 38 — DMEPOS: orthotics, prosthetics, prosthetic devices and vision services |
| BETOS category | D1F — Prosthetic and orthotic devices |
| Added | 1986-01-01 |
| Last action effective | 1996-01-01 |
2026 Medicare DMEPOS fee schedule for L5590
| Modifier | Meaning | Lowest state fee | Highest state fee | Ceiling | Floor |
|---|---|---|---|---|---|
| — | base fee | $2,943.01 | $4,568.53 | $3,924.01 | $2,943.01 |
| State | Modifier | Fee | Rural fee |
|---|---|---|---|
| AK | — | $4,099.81 | — |
| AL | — | $2,943.01 | — |
| AR | — | $3,391.89 | — |
| AZ | — | $3,924.01 | — |
| CA | — | $3,924.01 | — |
| CO | — | $3,758.59 | — |
| CT | — | $3,395.11 | — |
| DC | — | $2,943.01 | — |
| DE | — | $2,943.01 | — |
| FL | — | $2,943.01 | — |
| GA | — | $2,943.01 | — |
| HI | — | $4,383.95 | — |
| IA | — | $3,439.15 | — |
| ID | — | $3,093.82 | — |
| IL | — | $3,610.21 | — |
| IN | — | $3,610.21 | — |
| KS | — | $3,439.15 | — |
| KY | — | $2,943.01 | — |
| LA | — | $3,391.89 | — |
| MA | — | $3,395.11 | — |
| MD | — | $2,943.01 | — |
| ME | — | $3,395.11 | — |
| MI | — | $3,610.21 | — |
| MN | — | $3,610.21 | — |
| MO | — | $3,439.15 | — |
| MS | — | $2,943.01 | — |
| MT | — | $3,758.59 | — |
| NC | — | $2,943.01 | — |
| ND | — | $3,758.59 | — |
| NE | — | $3,439.15 | — |
| NH | — | $3,395.11 | — |
| NJ | — | $3,265.93 | — |
| NM | — | $3,391.89 | — |
| NV | — | $3,924.01 | — |
| NY | — | $3,265.93 | — |
| OH | — | $3,610.21 | — |
| OK | — | $3,391.89 | — |
| OR | — | $3,093.82 | — |
| PA | — | $2,943.01 | — |
| PR | — | $4,568.53 | — |
| RI | — | $3,395.11 | — |
| SC | — | $2,943.01 | — |
| SD | — | $3,758.59 | — |
| TN | — | $2,943.01 | — |
| TX | — | $3,391.89 | — |
| UT | — | $3,758.59 | — |
| VA | — | $2,943.01 | — |
| VI | — | $3,265.93 | — |
| VT | — | $3,395.11 | — |
| WA | — | $3,093.82 | — |
| WI | — | $3,610.21 | — |
| WV | — | $2,943.01 | — |
| WY | — | $3,758.59 | — |
How the L5590 fee compares
| Measure | Value |
|---|---|
| Rank among 13 L55 codes (lowest = 1) | 11 |
| Family fee range (average of state fees) | $1,800.60–$5,634.97 |
| Rural fee uplift | — |
Who bills L5590 (2024)
| Measure | Value |
|---|---|
| Suppliers billing rentals | — |
| Suppliers billing purchases | 294 |
| Referring clinicians | 527 |
| Medicare beneficiaries | 633 |
| States with claims | 15 |
| Share of services in top 3 states (California, Pennsylvania, New Jersey) | 44% |
| Year | Suppliers | Beneficiaries |
|---|---|---|
| 2022 | 358 | 691 |
| 2023 | 313 | 663 |
| 2024 | 294 | 633 |
Counts only. Supplier and clinician names, contact lists and state-by-state detail are in Caduvo.
Medicare utilization for L5590, 2022–2024
| Year | Services | Beneficiaries | Avg. allowed | Avg. paid |
|---|---|---|---|---|
| 2022 | 723 | 691 | $2,859.45 | $2,242.74 |
| 2023 | 687 | 663 | $3,093.88 | $2,413.67 |
| 2024 | 648 | 633 | $3,170.10 | $2,469.02 |
States with the most L5590 services (2024)
| State | Services | Avg. paid |
|---|---|---|
| California | 82 | $2,926.04 |
| Pennsylvania | 80 | $2,227.93 |
| New Jersey | 63 | $2,422.14 |
| Michigan | 47 | $2,671.55 |
| Virginia | 32 | $2,215.03 |
NCCI unit limits (MUE)
| Claim type | Max units per day | Rationale |
|---|---|---|
| DME suppliers | 2 | Anatomic Consideration |
| outpatient hospital claims | 2 | Anatomic Consideration |
Medicare policy articles for this code
- A52481: Orthopedic Footwear - Policy Article (CGS Administrators, LLC (DME MAC) Noridian Healthcare Solutions, LLC (DME MAC)) — mentions this code in its coding guidance
- A52496: Lower Limb Prostheses - Policy Article (CGS Administrators, LLC (DME MAC) Noridian Healthcare Solutions, LLC (DME MAC)) — mentions this code in its coding guidance
Covered diagnoses (84 ICD-10-CM codes)
The diagnoses most often listed as covered in the policy articles above:
| ICD-10-CM | Diagnosis | Articles listing it |
|---|---|---|
| Q72.00 | Congenital complete absence of unspecified lower limb | 1 |
| Q72.01 | Congenital complete absence of right lower limb | 1 |
| Q72.02 | Congenital complete absence of left lower limb | 1 |
| Q72.03 | Congenital complete absence of lower limb, bilateral | 1 |
| Q72.30 | Congenital absence of unspecified foot and toe(s) | 1 |
| Q72.31 | Congenital absence of right foot and toe(s) | 1 |
| Q72.32 | Congenital absence of left foot and toe(s) | 1 |
| Q72.33 | Congenital absence of foot and toe(s), bilateral | 1 |
| Q72.70 | Split foot, unspecified lower limb | 1 |
| Q72.71 | Split foot, right lower limb | 1 |
Showing 10 of 84. The full list, non-covered diagnoses and CSV export are in Caduvo.
What changed for L5590
- 2026-01-01: Average state fee rose 2.0%: $3,337.13 to $3,403.87
- 1986-01-01: L5590 added to HCPCS Level II
- Next scheduled CMS quarterly update (HCPCS and DMEPOS fee schedule): 2027-01-01
Frequently asked questions
What is HCPCS code L5590?
L5590 is the HCPCS Level II code for preparatory, above knee - knee disarticulation ischial level socket, non-alignable system, pylon no cover, sach foot, laminated socket, molded to model. Short descriptor: "Prep ak ischial laminated".
How much does Medicare pay for L5590?
Under the 2026 DMEPOS fee schedule, non-rural state fees are base (base fee): $2,943.01–$4,568.53. Rural fees can be higher.
Does Medicare cover L5590?
Coverage code C — Carrier judgment. Coverage is decided by the Medicare contractor (MAC) case by case.
Which diagnoses support coverage for L5590?
Medicare policy articles that cite L5590 list 84 covered ICD-10-CM diagnosis codes across 2 articles. The most cited include Q72.00 (Congenital complete absence of unspecified lower limb), Q72.01 (Congenital complete absence of right lower limb), Q72.02 (Congenital complete absence of left lower limb). A listed diagnosis is necessary but not sufficient; the policy's other criteria still apply.
Did the Medicare fee for L5590 change in 2026?
The average non-rural state fee moved from $3,337.13 in 2025 to $3,403.87 in 2026 (+2.0%). CMS's next quarterly HCPCS and DMEPOS update takes effect January 1, 2027.
How many units of L5590 can be billed per day?
2 on DME suppliers; 2 on outpatient hospital claims (NCCI medically unlikely edits).
Related L55 codes
- L5500 — Initial, below knee 'ptb' type socket, non-alignable system, pylon, no cover, sach foot, plaster socket, direct formed ($1,572.33–$2,284.23)
- L5505 — Initial, above knee - knee disarticulation, ischial level socket, non-alignable system, pylon, no cover, sach foot, plaster socket, direct formed ($2,129.35–$3,997.43)
- L5510 — Preparatory, below knee 'ptb' type socket, non-alignable system, pylon, no cover, sach foot, plaster socket, molded to model ($1,782.34–$3,045.67)
- L5520 — Preparatory, below knee 'ptb' type socket, non-alignable system, pylon, no cover, sach foot, thermoplastic or equal, direct formed ($1,760.53–$3,045.67)
- L5530 — Preparatory, below knee 'ptb' type socket, non-alignable system, pylon, no cover, sach foot, thermoplastic or equal, molded to model ($1,206.25–$3,245.65)
- L5535 — Preparatory, below knee 'ptb' type socket, non-alignable system, no cover, sach foot, prefabricated, adjustable open end socket ($2,076.09–$3,553.71)
- L5540 — Preparatory, below knee 'ptb' type socket, non-alignable system, pylon, no cover, sach foot, laminated socket, molded to model ($2,215.83–$3,140.85)
- L5560 — Preparatory, above knee- knee disarticulation, ischial level socket, non-alignable system, pylon, no cover, sach foot, plaster socket, molded to model ($2,379.43–$4,568.53)
- L5570 — Preparatory, above knee - knee disarticulation, ischial level socket, non-alignable system, pylon, no cover, sach foot, thermoplastic or equal, direct formed ($1,308.69–$3,428.66)
- L5580 — Preparatory, above knee - knee disarticulation ischial level socket, non-alignable system, pylon, no cover, sach foot, thermoplastic or equal, molded to model ($1,738.32–$4,142.56)
- L5585 — Preparatory, above knee - knee disarticulation, ischial level socket, non-alignable system, pylon, no cover, sach foot, prefabricated adjustable open end socket ($3,132.31–$4,568.53)
- L5595 — Preparatory, hip disarticulation-hemipelvectomy, pylon, no cover, sach foot, thermoplastic or equal, molded to patient model ($4,929.43–$11,195.96)
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Next steps
- Run a reimbursement report for a device billed under L5590
- Watch L5590 for fee, coverage and descriptor changes
- Build a full Medicare revenue model for L5590
Sources: CMS HCPCS Level II release October 2025; CMS DMEPOS fee schedule 2026; CMS NCCI MUE tables; CMS Medicare utilization (physician and DME supplier files); CMS Medicare Coverage Database articles. Fees are Medicare allowables, not commercial rates. Not billing or legal advice.